NEMATODE PARASITES OF BIRDS 389 



350,1* wide. Vulva inconspicuous, anterior to middle of body, divid- 

 ing latter in ratio of about 3 : 5. Ovejeetor directed forward. Tail 

 about 2 mm. long. Eggs 56/* to 63/* by 34/* to 42/*. 



CHEILOSPIRURA SKRJABINI (Ozerska, 1926) Cram, 1927 



Synonym. — Acuaria (Oheilospirura) skrjabini Ozerska, 1926. 20 

 From the house sparrow ; Don district, Russia. 



Morphology. — Oheilospirura (p. 226) : Male 8.7 to 9.2 mm. long 

 by 140/* to 190/c wide. Pharynx 160/* to 194/* long; first part of 

 esophagus 399/* to 456/* long; second part of esophagus 930/* to 1.08 

 mm. long. Cordons 250/* to 285/* long. Spicules unequal, the one 

 205/* to 239/* long, the other 125/* to 148/* long. Cloacal aperture 

 200/* from posterior end. Ten pairs of caudal papillae, of which 

 four are preanal and six postanal; of the postanal, the distance 

 between pairs 3 and 4 is slightly greater than between the other pairs, 

 the spacing between the others being almost equal. Female 23 to 

 27 mm. long by 130/* to 200/* wide. Pharynx 182/* to 228/* long; 

 first part of esophagus 593/* to 707/* long; second part of esophagus 

 1.25 to 1.7 mm. long. Cordons 285/* to 387/* long. Vulva 11.11 

 to 13.11 mm. from head end of worm; anus 170/* to 250/* from 

 posterior end. Eggs 43/* to 48/* by 28/* to 29/*. 



CHEILOSPIRURA PAVONIS (Ortlepp, 1925) Cram, 1927 



Synonym. — Acuaria (Cheilospirwa) pavonis Ortlepp, 1925. 27 

 From under lining of gizzard of Pavo muticus; locality not given. 



Morphology. — Cheilosplrura (p. 226) : Head with two lateral tri- 

 angular lips, each with a large blunt tooth; no external papillae 

 noted. Cuticle with coarse cross striations. Cordons in their pos- 

 terior parts appear corrugated, as if made up of a series of elongated 

 bosses. Total length of esophagus about 1/3.2 of body length. 

 Male 6.5 mm. long by 180/* wide. Cordons 4.8 mm. long. Pharynx 

 157/* long by 30/* wide; muscular part of esophagus 654/*. long; 

 glandular part of esophagus 1.38 mm. long. Posterior end of body 

 coiled slightly; caudal papillae well developed; ventral surface with 

 coarse cross striations. Ten pairs of caudal papillae, of which four 

 pairs are preanal, six pairs postanal. Spicules unequal and dissimi- 

 lar, the left 1.56 mm. long by 16/* wide, with chisel-like tip; the right 

 215/* long and very broad. Gubernaculum absent. Female 14.7 

 mm. long by 358/* wide. Pharynx 305/* long by 60/* wide ; muscular 

 part of esophagus 1.14 mm. long; glandular part 3.25 mm. long. 

 Dorso-lateral cordons extend slightly posterior to vulva; ventro- 



28 Trudy Gossud. Inst. Eksper, Vet., Moskow, vol. 2 (2), pp. 103, 104, figs. 1. 2. 

 "Journ. Helminth., London, vol. 3, pp. 177-179, 3 figs. 



